Operator’s Manual Vehicle Maintenance CXU, CHU, GU, TD, MRU and LEU 99
Drive Belt Installation To install a poly V-belt, swing the automatic tensioner to the full sprung position (fully toward the install stop), then place the belt over the pulleys. Slowly return the automatic tensioner back to its original position. Do not allow the tensioner to snap against the stops. For proper belt routing, refer to the following belt routing diagrams. Before installing the new belt, ensure that the pulley grooves are clean and free of debris. Certain GU and CXU model chassis equipped MP7 engines utilize a 10-rib belt on 12-rib pulleys. When replacing the belt, the belt must be installed against the rear face of the pulley (edge of pulley closest to the engine) as shown in the illustration below.
W0054031
10-Rib Belt Installation on 12-Rib Pulley
1. Install 10-rib belt against rear edge of 12-rib pulley. Drive Belt Routing MACK MP7 and MP8 engines, all models.
